Arctic LTER

Weather at Toolik

Arctic LTER Database

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The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:

1) Acceptable use. Use of the dataset will be restricted to academic, research, educational, government, recreational, or other not-for-profit professional purposes. The Data User is permitted to produce and distribute derived works from this dataset provided that they are released under the same license terms as those accompanying this Data Set. Any other uses for the Data Set or its derived products will require explicit permission from the dataset owner.
2 ) Redistribution. The data are provided for use by the Data User. The metadata and this license must accompany all copies made and be available to all users of this Data Set. The Data User will not redistribute the original Data Set beyond this collaboration sphere.
3 ) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier. For example:

Shaver, G. 1989. Above ground biomass in acidic tussock tundra experimental site, 1989, Arctic LTER, Toolik, Alaska. Arctic LTER, Marine Biological Lab, Woods Hole, Ma 02543. 1989gsttbm http://ecosystems.mbl.edu/arc/terrest/biomass/index.shtml

4 ) Acknowledgement. The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed significantly to its content. Acknowledgements should identify the supporting party, the party that received the support, and any identifying information such as grant numbers. For example:

Data sets were provided by the Arctic LTER. This material is based upon work supported by the National Science Foundation under Grants #DEB-981022, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493.

5 ) Notification. The Data User will notify the Data Set Contact when any derivative work or publication based on or derived from the Data Set is distributed. The Data User will provide the data contact with two reprints of any publications resulting from use of the Data Set and will provide copies, or on-line access to, any derived digital products. Notification will include an explanation of how the Data Set was used to produce the derived work.
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While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.

Dataset URLs:	METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:	2004AKLakes_physcem.03
Dataset Title:	Physical and chemical data for various lakes near Toolik Research Station, Arctic LTER Summer 2004.
Investigator 1:
First Name:	Anne
Last Name:	Giblin
Organization:	Marine Biological Laboratory
Address line 2:	Ecosystems Center
Address line 3:	7 MBL Street
City:	Woods Hole
State:	MA
Zip Code:	02543
Country:	United States of America
Investigator 2:
First Name:	Christopher
Last Name:	Luecke
Organization:	Utah State University
Address line 2:	Department of Watershed Science
Address line 3:
City:	Logan
State:	UT
Zip Code:	84322-5210
Country:	United States of America
Investigator 3:
First Name:	George
Last Name:	Kling
Organization:	University of Michigan
Address line 2:	Department of Ecology and Evolutionary Biology
City:	Ann Arbor
State:	MI
Zip Code:	48109-1048
Country:	United States of America
Investigator 4:
First Name:	Chris
Last Name:	Crockett
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Associate Investigators:
Keywords:	chemistry, hydrolab, depth, pH, conductivity, temperature, PAR, light, dissolved oxygen, DO, chlorophyll, chlorophyll a, aquatic, aquatic ecosystems, arctic, freshwater, irradiance, lakes, limnology, oxygen, photosynthetically active radiation, physical, specific conductivity,
Abstract:	Yearly file describing the physical/chemical values recorded at various lakes near Toolik Research Station. Sample site descriptors include site, date, time, depth. Depth profiles of physical measures collected in situwith Hydrolab Datasonde in the field include temperature, conductivity, pH, dissolved oxygen in both percent saturation and mg/l, SCUFA chlorophyll-a values in both volts and µg/l, and PAR.
For questions about the Metadata and data contact the Investigators. For information about this web site contact:	Arctic LTER Information Manager The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole, MA 02543 Phone (508) 289 7496 Email: arc_im@mbl.edu Online URL: http://ecosystems.mbl.edu/ARC/
DATA FILE INFORMATION:
Data File URL	http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10247&urlTail=lakes/physchem/data/2004_ArcticLTER_Lakes_physcem.csv
Data File Name	2004_ArcticLTER_Lakes_physcem
Beginning Date	6/16/2004
End Date	8/23/2004
Number of Data Records	1761
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Entered metadata into new metadata form.
	Version 2: Updated metadata form to newer version (without site sheet). Updated units to current standards. CH 6Feb2013
	Version 3: Updated metadata form to newer version with site sheet. Note need site coordinates for Pump Station 3/ Hidden Lake. CH March 2013.

RESEARCH LOCATION:
Location Name	Toolik Central	Toolik Inlet	Toolik inlet bay	E 01	E 05	E 06	I1	I2	I3	I4	I5	I6	I6 headwater lake	I7	I8	I swamp	N 01	N 02	S 06	S 07	S 11	NE 9B	Fog lake 2	Fog lake 4	Green Cabin Lake	I Minus 01
Geographic Description	Toolik Lake, Main Station	Toolik Lake inlet	Toolik inlet bay	Lake E1	Lake E5	Lake E6	Lake I1	Lake I2	Lake I3	Lake I4	Lake I5	Lake I6	Lake I6 Headwaters	Lake I7	Lake I8	Lake ISwamp	Lake N1	Lake N2	Lake S6	Lake S7	Lake S11	Lake NE9B	Fog 2	Fog 4	Green Cabin Lake	I Minus 1
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude	68.629961	68.629961	68.629961	68.6261956028	68.642611	68.6434270583	68.5687130789	68.5713195633	68.5755366301	68.57956715	68.5873874391	68.5965924039	68.582062	68.6008747982	68.6101575207	68.610781	68.6398939358	68.6409472345	68.6293797816	68.6300627447	68.630148049	68.6526454831	68.6833333333333	68.68	68.53698	68.55361
Longitude	-149.612633	-149.612633	-149.612633	-149.555347706	-149.458079	-149.440564592	-149.58807625	-149.565881618	-149.583644456	-149.58405938	-149.589625877	-149.59264335	-149.622932	-149.596582063	-149.582211513	-149.600742	-149.606965643	-149.625086307	-149.641623295	-149.644441789	-149.650579145	-149.599473662	-149.1	-149.071666666667	-149.2374	-149.53397
Elevation	719	719	719	762	800	792	785	785	774	770	767	754	806	742	744	736	731	724	731	731	750	747	785	754	883	820
Link to Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map


TAXONOMIC COVERAGE:
Organisms studied

Methods:	For field work and sampling protocols see "Sampling and Field Methods Protocol" on The Arctic LTER webpage (http://ecosystems.mbl.edu/ARC/) specific link found below. All measurements were taken with a Hydrolab Datasonde. Depth reading on sonde was calibrated in the field so that a depth of 0m was the water surface. For profiles, measurements were taken at surface (~0m), at ~0.5m depth, at ~1m of depth, then at 1m intervals until bottom. Measurements were recorded on a Surveyor 4a datalogger and also recorded in a field book. Values recovered from the Surveyor 4a datalogger were used except where values were either missing or highly suspect, in which case values from the fieldbook were used and noted under the "Notes" column. This file was created from a working file titled "2004AKLakes". History of the file is listed below: Date User Changes/Corrections 29-Sep-04 added 2004 physchem data to AK LAKES 29-Sep-04 added 2004 CHN data to AK LAKES, awaiting E5, E6, TLK CHN data from Sally MacIntyre before adding additional data 17-Nov-04 added 2004 CHN for Toolik, E5, E6, Sally MacIntyre UCSB was running these for me 17-Nov-04 added and double checked NO3 data, but "missing" several samples, will recheck nitrate tubes, maybe I just missed a bag 17-Nov-04 started adding TDN data, will double check data on the 18th 18-Nov-04 checked every 10th lter# to confirm agreement between AK file and Nitrate file, all points agreed 18-Nov-04 checked every 10th lter# to confirm agreement between AK file and TDN file, all points agreed 18-Nov-04 checked every 10th lter# to confirm agreement between AK file and CHN file, all points agreed 18-Nov-04 added chl a, NH4, and PO4 data, need to double check data agreement between AK lakes and specific files to insure accuracy, do this on the 19th 18-Nov-04 sample reps of NH4, PO4, chl were averaged and only the avg is reported in 2004AKLAKES 22-Nov-04 checked every 10th lter# to confirm agreement between AK file and NH4 file, all points agreed 22-Nov-04 quick check of tdn, nitrate, chn, etc (every 50th point) to make sure no errors occurred in the addition of NH4 PO4 data on the 18th 29-Nov-04 changed value of NH4 data point on Toolik 7.5m 2 July 2004-removed outlier point (0.430um NH4) from average 29-Nov-04 had labels switched on particulates, reversed C and N, made changes and placed in proper column order 30-Nov-04 added columns for C:P and N:P ratios 16-Dec-04 added to website, minus the chl data 28-Jan-05 added TN and TP columns 8-Feb-05 added TN calculation 3-Mar-05 added PP data, hand entered 3-Mar-05 added select TDP data for TP calculations, more to be added later 21-Mar-05 added calculation for converting uM PP to ug/L, need to confirm calculation 21-Mar-05 added calculation for C:P and N:P ratios 24-May-05 added 04 PP data, I'm missing the last batch of august PPs check in AK, I may not have packed them up 25-May-05 added remaining TDP data 25-May-05 Finished Total N column calculations 25-May-05 Finished Total P column calculations 26-May-05 added E5 E6 NH4/SRP data which were analyzed on 25/26 May by PIE RAs Lee and Gaines 27-May-05 added last batch of PP data run on 27May05 mostly I Series samples 27-May-05 read notes on I3 samples 29, 171, 172 I'm missing an I3 22june04 3m, but I''ve a "duplicate" 13july04 sample, are these two switched 29-Nov-05 updated website file aklakes 29-Nov-05 corrected data point for E6 23Aug04 0m NH4um which was incorrectly entered as 0.28 instead of 0.58uM 5-Dec-05 added 2004 CHN data which was ran in 2005, including values for Green Cabin 12Aug04, I Minus 12Aug04, and Toolik 13Aug04, see above link 6-Feb-05 added columns for pheophytin, but no data yet 22-Feb-06 recalculated nitrate values (digestion eff. Change) in 2004 Nitrate.xls and transferred new values to 2004AKLAKES, values differ by less than 5% 22-Feb-06 ran data checks, all look good 1-May-06 sent file to C. Luecke

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Site	Site Name: Name of the lake where measurements were taken. There are discrete sampling sites defined by water depth, generally they are at the point of maximum depth.	text			Toolik Main= the main sampling station on Toolik Lake's largest basin\| E= lakes of the E-Series\| I=lakes of the I-Series\| N=lakes of the N-Series\| S=lakes of the S-Series\| Fog=lakes of the Fog-Series
Date	Date readings were taken on.	datetime		dd-mmm-yyyy
Time_hr_dst	Exact time that each reading was recorded in Alaska Daylight Savings Time (1 hour ahead of Alaska Standard Time: if 13:00 DST than 12:00 AST)	datetime		hh:mm:ss		.=Missing or Not Measured
IBVSvr4a_V	Internal Battery Voltage of the Surveyor 4a Datalogger.	number	volt			.=Missing or Not Measured
Temp_C	Water temperature at depth.	number	celsius			.=Missing or Not Measured
Cond_uS	Electrical conductivity of the water at depth.	number	microsiemenPerCentimeter			.=Missing or Not Measured
Dep_m	Depth of water measurement taken at starting from the surface as 0.	number	meter			.=Missing or Not Measured
pH	pH (opposite of the log of the hydrogen ion concentration).	number	dimensionless			.=Missing or Not Measured
DO_Sat	The percent saturation of dissolved oxygen at depth.	number	percent			.=Missing or Not Measured
DO_mg/l	The concentration of dissolved oxygen at depth.	number	milligramPerLiter			.=Missing or Not Measured
Chl_V	In Vivo measurement of chlorophyll-a concentration.	number	volt			.=Missing or Not Measured
Chl_ug/l	In Vivo measurement of chlorophyll-a concentration.	number	microgramPerLiter			.=Missing or Not Measured
PAR_uEm2s	PAR (photosynthetically active radiation) measured below the water surface.	number	microEinsteinPerMeterSquaredPerSecond			.=Missing or Not Measured
refPAR_uEm2s	PAR (photosynthetically active radiation) measured with Deck unit to correct for changes in ambient light.	number	microEinsteinPerMeterSquaredPerSecond			.=Missing or Not Measured
Secchi_m	Measure of water transparency by depth a Secchi Disk is visible to.	number	meter			.=Missing or Not Measured
Hydrolab	This field indicates which Hydrolab Datasonde instrument was used to take measurements	text			1=Arctic LTER Hydrolab Datasonde DS5\| 2=Toolik Field Station Datasonde DS5\| 3=Arctic LTER Hydrolab Datasonde DS4a\| 4=O'Brian's Hydrolab (BP set at 760 mmHg)
Notes	Any additional information pertaining to measurments made for a particular depth, place and time.	text

	Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.